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基于触头动态接触压力的触头弹跳分析

, PP. 138-144

Keywords: 触头接触压力,触桥,触头弹跳,压电薄膜,危险振动

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Abstract:

根据弹性波原理,以CJ20-25型交流接触器为试验品,采用以压电薄膜为敏感元件制成的触头接触压力传感器,分别测得一相主触头触桥上两个触头的动态接触压力信号,用以研究该相主触头的触头弹跳情况;利用高速摄像机技术分析了触头运动过程中的摆动和振动情况;应用小波工具箱对该触头接触压力信号进行了降噪处理;研究了触头弹跳与触头断通信号的关系以及触头弹跳与合闸相角的关系。由分析结果可见,触头动态接触压力信号可揭示触头弹跳和断通信号的变化原因,合闸相角为60°时,各项指标综合最差。

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